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trace: rename unlikely profiler to branch profiler

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Impact: name change of unlikely tracer and profiler

Ingo Molnar suggested changing the config from UNLIKELY_PROFILE
to BRANCH_PROFILING. I never did like the "unlikely" name so I
went one step farther, and renamed all the unlikely configurations
to a "BRANCH" variant.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-11-12 15:24:24 -05:00 committed by Ingo Molnar
parent 68d119f0a6
commit 2ed84eeb88
9 changed files with 27 additions and 27 deletions
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2
arch/x86/kernel/vsyscall_64.c
View file

@ -18,7 +18,7 @@
*/
/* Disable profiling for userspace code: */
#define DISABLE_UNLIKELY_PROFILE
#define DISABLE_BRANCH_PROFILING
#include <linux/time.h>
#include <linux/init.h>

2
arch/x86/vdso/vclock_gettime.c
View file

@ -10,7 +10,7 @@
*/
/* Disable profiling for userspace code: */
#define DISABLE_UNLIKELY_PROFILE
#define DISABLE_BRANCH_PROFILING
#include <linux/kernel.h>
#include <linux/posix-timers.h>

2
include/asm-generic/vmlinux.lds.h
View file

@ -45,7 +45,7 @@
#define MCOUNT_REC()
#endif
#ifdef CONFIG_TRACE_UNLIKELY_PROFILE
#ifdef CONFIG_TRACE_BRANCH_PROFILING
#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_likely_profile) = .; \
*(_ftrace_likely) \
VMLINUX_SYMBOL(__stop_likely_profile) = .; \

19
include/linux/compiler.h
View file

@ -59,26 +59,27 @@ extern void __chk_io_ptr(const volatile void __iomem *);
* specific implementations come from the above header files
*/
/*
* Note: DISABLE_UNLIKELY_PROFILE can be used by special lowlevel code
* to disable branch tracing on a per file basis.
*/
#if defined(CONFIG_TRACE_UNLIKELY_PROFILE) && !defined(DISABLE_UNLIKELY_PROFILE)
struct ftrace_likely_data {
struct ftrace_branch_data {
const char *func;
const char *file;
unsigned line;
unsigned long correct;
unsigned long incorrect;
};
void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect);
/*
* Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code
* to disable branch tracing on a per file basis.
*/
#if defined(CONFIG_TRACE_BRANCH_PROFILING) && !defined(DISABLE_BRANCH_PROFILING)
void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
#define likely_notrace(x) __builtin_expect(!!(x), 1)
#define unlikely_notrace(x) __builtin_expect(!!(x), 0)
#define likely_check(x) ({ \
int ______r; \
static struct ftrace_likely_data \
static struct ftrace_branch_data \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_likely"))) \
______f = { \
@ -93,7 +94,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect);
})
#define unlikely_check(x) ({ \
int ______r; \
static struct ftrace_likely_data \
static struct ftrace_branch_data \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_unlikely"))) \
______f = { \

10
kernel/trace/Kconfig
View file

@ -159,7 +159,7 @@ config BOOT_TRACER
selected, because the self-tests are an initcall as well and that
would invalidate the boot trace. )
config TRACE_UNLIKELY_PROFILE
config TRACE_BRANCH_PROFILING
bool "Trace likely/unlikely profiler"
depends on DEBUG_KERNEL
select TRACING
@ -175,7 +175,7 @@ config TRACE_UNLIKELY_PROFILE
Say N if unsure.
config TRACING_UNLIKELY
config TRACING_BRANCHES
bool
help
Selected by tracers that will trace the likely and unlikely
@ -183,10 +183,10 @@ config TRACING_UNLIKELY
profiled. Profiling the tracing infrastructure can only happen
when the likelys and unlikelys are not being traced.
config UNLIKELY_TRACER
config BRANCH_TRACER
bool "Trace likely/unlikely instances"
depends on TRACE_UNLIKELY_PROFILE
select TRACING_UNLIKELY
depends on TRACE_BRANCH_PROFILING
select TRACING_BRANCHES
help
This traces the events of likely and unlikely condition
calls in the kernel. The difference between this and the

7
kernel/trace/Makefile
View file

@ -11,9 +11,8 @@ obj-y += trace_selftest_dynamic.o
endif
# If unlikely tracing is enabled, do not trace these files
ifdef CONFIG_TRACING_UNLIKELY
KBUILD_CFLAGS += '-Dlikely(x)=likely_notrace(x)'
KBUILD_CFLAGS += '-Dunlikely(x)=unlikely_notrace(x)'
ifdef CONFIG_TRACING_BRANCHES
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
endif
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
@ -31,6 +30,6 @@ obj-$(CONFIG_STACK_TRACER) += trace_stack.o
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
obj-$(CONFIG_FUNCTION_RET_TRACER) += trace_functions_return.o
obj-$(CONFIG_TRACE_UNLIKELY_PROFILE) += trace_unlikely.o
obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_unlikely.o
libftrace-y := ftrace.o

2
kernel/trace/trace.c
View file

@ -258,7 +258,7 @@ static const char *trace_options[] = {
"sched-tree",
"ftrace_printk",
"ftrace_preempt",
#ifdef CONFIG_UNLIKELY_TRACER
#ifdef CONFIG_BRANCH_TRACER
"unlikely",
#endif
NULL

6
kernel/trace/trace.h
View file

@ -468,7 +468,7 @@ enum trace_iterator_flags {
TRACE_ITER_SCHED_TREE = 0x200,
TRACE_ITER_PRINTK = 0x400,
TRACE_ITER_PREEMPTONLY = 0x800,
#ifdef CONFIG_UNLIKELY_TRACER
#ifdef CONFIG_BRANCH_TRACER
TRACE_ITER_UNLIKELY = 0x1000,
#endif
};
@ -530,7 +530,7 @@ static inline void ftrace_preempt_enable(int resched)
preempt_enable_notrace();
}
#ifdef CONFIG_UNLIKELY_TRACER
#ifdef CONFIG_BRANCH_TRACER
extern int enable_unlikely_tracing(struct trace_array *tr);
extern void disable_unlikely_tracing(void);
static inline int trace_unlikely_enable(struct trace_array *tr)
@ -552,6 +552,6 @@ static inline int trace_unlikely_enable(struct trace_array *tr)
static inline void trace_unlikely_disable(void)
{
}
#endif /* CONFIG_UNLIKELY_TRACER */
#endif /* CONFIG_BRANCH_TRACER */
#endif /* _LINUX_KERNEL_TRACE_H */

4
kernel/trace/trace_unlikely.c
View file

@ -15,7 +15,7 @@
#include <asm/local.h>
#include "trace.h"
#ifdef CONFIG_UNLIKELY_TRACER
#ifdef CONFIG_BRANCH_TRACER
static int unlikely_tracing_enabled __read_mostly;
static DEFINE_MUTEX(unlikely_tracing_mutex);
@ -119,7 +119,7 @@ static inline
void trace_likely_condition(struct ftrace_likely_data *f, int val, int expect)
{
}
#endif /* CONFIG_UNLIKELY_TRACER */
#endif /* CONFIG_BRANCH_TRACER */
void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect)
{